Viewing archive of Saturday, 5 December 2009
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2009 Dec 05 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 339 Issued at 2200Z on 05 Dec 2009IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z Solar activity was very low. No significant flares
were observed during the past 24 hours. The visible solar disk is
spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
The geomagnetic field was quiet. Solar wind observations from the
ACE spacecraft indicate the onset of a co-rotating interaction
region at around 06/0530Z. Solar wind velocity and density
increased slightly with fluctuations in the IMF Bt and Bz.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled, with a slight chance for isolated
active conditions, for day one (06 December) due to a coronal hole
high speed stream. Conditions are expected to be predominately
quiet for days two and three (07-08 December).
III. Event Probabilities 06 Dec to 08 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 05 Dec 072 Predicted 06 Dec-08 Dec 073/073/073 90 Day Mean 05 Dec 072
V. Geomagnetic A Indices
Observed Afr/Ap 04 Dec 000/000 Estimated Afr/Ap 05 Dec 002/005 Predicted Afr/Ap 06 Dec-08 Dec 007/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 06 Dec to 08 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 05% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 05% | 05% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 05% | 01% | 01% |
All times in UTC
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